Power-loom



Umano srarns PATENT OFFICE'.

GEO. B. SANFORD, OF PUTNEY, VERMONT.

i POWER-LOOM.

Speccaton of Letters Patent No. 3,005, dated March 17, 1843; AntedatedOctober 31, 1842.

To all whom i may concern:

Be it known that I, GEORGE BaSANroRD,

of Putney, Windham county, State of Vermont, have invent-ed a new anduseful Improvement in Powerliooms, of which the following is a full andaccurate description, reference being had to the accompanying drawings,making part of this specification.

In its general construction my power loom is the same as the commoncashmere loom, my improvement consisting in a new mode of arranging theseveral parts for producing the shuttle motion, the object of thisarrangement being to simplify the construction and give a more livelymotion to the shuttle.

No. l is a perspective View of the loom deprived of its harness tackle.

E is the main shaft; E', the fast and loose pulley on one end of it;F,.the cog or gear wheel on the other end for operating the cam shaftand I4" the cog wheel on the end of the cam shaft into which itgears-the whole of this arrangement being the same as in the ordinarypower loom.

My rst improvement consists in a mode of arranging and operating theharness cams independently of the cam shaft s0 as to allow of my givinggreater speed to the latter than I otherwise could and producing therebya. more lively motion of the shiittles. A section of the cam shaft soconstructed is shown under No. 2, g g being a section of the cam shaft-77 the two shuttle cams fastened to it in the usual way, and 8 8 the twoharness cams arranged between them. The harness cams are not fastened tothe cam shaft as in the common power loom so as to revolve with it butset loosely upon it; the shaft serving as an arbor for them to turnupon. A gear or cog .wheel B to which the harness cams `are bolted isarranged between them in the same manner so that the wheel and harnesscams revolve together independent of the cam shaft, the cam wheel Breceiving its mot-ion from a pinion A on the main shaft E an arrangementwhich allows of my giving greaterspeed to the cam shaft and shuttle camsthan to those for operating the harness treadles, the gear-ing being socalculated as to produce this effect,

which enables me to give a more lively mo-v tion to the shuttle. y

The next portion of my improvementis a new mode of arranging the partsby which the shuttle is immediately operated. -I dispense with therocker wag staff and picker 4 Vstraps employed in the common loom anduse instead of them what I denominate whip staffs one of which is placedon each side of the loom. These whip staffs are marked 4 4 in thedrawing and consist of two parts a vertical rod e the upper end of whichenters the shuttle box through a slot in the bottom of the lathe havingits place behind the picker and of a short arm marked bent outward at aright angle from the bottom of the rod. kEach of the whip staffs so con-/structed is hinged at rthe point or elbow where. the parts 4L 4L unitetoV a horizontal armrof metal marked 3 in the drawing which projectsoutwardly from the back of each of the swords D of the loom the innerends of the arms `3 3being fastened to it near the point at which t-heconnecting girt C andV swords D are joined to yeach other. To

4operate these whip staffs I employ two horizontal bars or levers ofwood or metal 2 2 largest at the middle of their length and taperingfromthence to each end-one of these is attached to the front of each swordby a pin passed through its middle into the sword at a point immediatelyopposite to that at which the arm 3 is fastened .the pin answering as afulcrum for it to move upon. It extends suiiiciently far each way toconnect withthe shuttle treadle next to it on the inside of the loom towhich its inner end is fastened by a strap or hinge and with the arm 4of the whipstaff on the outside of the loom to which its outer end isconnected by a pin projecting from this end which enters a slot in thearm 4 of the whip staff. Vhen either of the shuttle treadles isdepressed the end of the lever attached to it ,is depressed also,elevating its opposite end so as to force the whip staif in against theshuttle. The lever is elevated again by another arrangement shown in No.3 which is a front view of the swords D, with the levers 2 2 on alargerscale a straight spring S No. 3 of some inches in length is placedvertically upon each of the swords D immediately above the fulcrum ofthe lever and is secured by its upper end to the sword, its lower endwhich is free bearing aga-inst the inside of a lip or projection 2 onthe upper side of the lever. This spring is forced back when the innerend of the lever is depressed by the shut-tlc cam acting on the treadlebut reacts after the depressing power is removed and restores the leverand whip staff to its first position. To regulate the bearing of thespring there is a set screw w No. 3 adapted to a female screw y in thehead of a pin which is fastened to the front of each of the swords aboutmidway the height of the spring. The end of this screw presses againstthe inside of the spring and by tightening or loosening it the stiffnessof the` spring may be increased or diminished.

As the cam shaft has greater speed in my arangement than in the ordinarypower loom I am enabled to lessen the inclination of t-he treadle stepas the increased rapidity given to the shuttle cams renders a greatinclination unnecessary. The result is that in my loom owing to thiscombination not only is a more lively motion given to the shuttle, butthere is a saving of power in running the loo-m. At No. 2 a Ydetachedview of the step is given formed in this way, G being the treadle stepconsisting of two inclined planes like those in use with this eX-ception that the plane on the front of the step is less inclined than inthe ordinary arrangement and that on the back of the step is longer andhigher behind than in the common loom this change in the construction ofthe step being made to adapt it to the increased velocity given to theshuttle cams.

I-Iaving described my improvement in power looms what I claim as myinvention and desire to secure by Letters Patent is l. The mode ofarranging and operating the harness cams by placing them loosely on thecam shaft and combining with them Va gear wheel B operated by a pinion Aon the main shaft E all as herein set forth, this arrangement allowingof my increasing the speed of the cam shaft for the purpose hereinreferred to. Y

2. I claim Vthe Inode of constructing and arranging the parts forproducing the'shut tle motion. I am aware that a .whip sta' operated bylevers has been employed forr this purpose. This I do not claimtherefore7 what --I do claim is the inode of constructing the whip stasby making them bent levers as described in combination with thehorizontal levers 2 2 and springs S S attached GEORGE B. SANFORD."

Witnesses:

. JONATHAN CU'rLER,

ISRAEL ABBOTT.

